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@letsbecellmates
Learn more: Petri dishes are named after their inventor, Julius Richard Petri.
Bacteria can talk to each other by secreting and sensing molecules! It helps them know how many of them are around, and if there are enough to start an infection. This process is called quorum sensing.
Learn more: Antibodies stick to foreign objects in the body (âantigensâ). Their affinity for each object depends on the amino acids in their binding sites.
Learn more: Nerve cells look like trees. They even have branches.
Learn more:
Cells replicate by going through the cell cycle. Itâs their life cycle.
Cells can change proteins on their surfaces to match their environment. There are thousands of known surface proteins.
Apoptosis is cell suicide. It is an important tool! For example, in the womb humans have webbed fingers and toes. Cells in the webbing die via apoptosis before weâre born, giving us free digits.
Learn more: Skin cells come in many shapes and are found throughout the body. Scientists estimate you shed about a million skin cells every day! Household dust is mostly old skin cells.
Learn more: There are hundreds of lymph nodes in your body. Cells go to lymph nodes to learn about infections, then they head out ready to attack!
Learn more: Cells can share nutrients with each other. They pass them through special channels and ports connecting their membranes called cell junctions.
Happy Halloween from Cellmates!
Learn more: Certain germs, like bacteria, can resist antibiotics designed to kill them. This can happen rapidly when bacteria share resistance genes between each other.
Check out this cool time lapse video showing antibiotic resistance happening before your eyes!
Learn more: Sometimes cells donât know theyâre infected. Viruses are sneaky and use many tools to avoid detection.
Learn more: Mitochondria are cell parts that help make energy.
Scientists think they were once free bacteria because they have their own genome.
Learn more: Cells really get around. To move, cells can rearrange their cell skeleton (cytoskeleton) and even grow âfeetâ (lamellipodia).
Mitosis is the process of cell division.
Learn more: Usually cells look clear. Adding a dye or stain makes certain inner parts (called organelles) visible under a microscope.
You can simulate staining different cell parts using this cool online tool.
Learn more: Red blood cells have molecules on their surfaces that decide blood type. Red blood cells without A or B molecules on them can be safely donated to people of all blood types.Â
Donating blood is easy. Learn how you can help and schedule an appointment today!
Learn more: Some cells have âmajor histocompatability complexesâ (MHCs) on their surfaces that display foreign molecules. MHCs help alert the immune system when you have an infection.
Learn more: Cells have all kinds of molecules on their surfaces. These âreceptorsâ help cells communicate and sense their environment.
(Cellmates think they also make good bouquets.)
Learn more: Your body is constantly making new cells. Older âparentâ cells divide to form two âdaughter cells.â Cells reproduce at different rates depending on their type (skin cells are some of the fastest, brain cells are some of the slowest).